Home / 20,083.86-27,715.28-11,131.47

Finding the Fourth Proportional to 20,083.86, 27,715.28 and 11,131.47

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Solution

The fourth proportional to 20,083.86, 27,715.28 and 11,131.47 is: 15,361.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,083.86 : 27,715.28 = 11,131.47 : x
  2. Step 2: Convert to fraction form
    20,083.86/27,715.28 = 11,131.47/x
  3. Step 3: Cross multiply
    20,083.86x = 27,715.28 × 11,131.47
  4. Step 4: Simplify right side
    20,083.86x = 308,511,752.20
  5. Step 5: Solve for x
    x = 308,511,752.20/20,083.86
  6. Step 6: Final answer
    x = 15,361.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.